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Finding the Fourth Proportional to 978,821.60, 1,468,232.40 and 314,040.80

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Solution

The fourth proportional to 978,821.60, 1,468,232.40 and 314,040.80 is: 471,061.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,821.60 : 1,468,232.40 = 314,040.80 : x
  2. Step 2: Convert to fraction form
    978,821.60/1,468,232.40 = 314,040.80/x
  3. Step 3: Cross multiply
    978,821.60x = 1,468,232.40 × 314,040.80
  4. Step 4: Simplify right side
    978,821.60x = 461,084,877,481.92
  5. Step 5: Solve for x
    x = 461,084,877,481.92/978,821.60
  6. Step 6: Final answer
    x = 471,061.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.